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Network query ... again



 
 
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  #1  
Old December 12th 17, 09:34 PM posted to alt.windows7.general
pjp[_10_]
external usenet poster
 
Posts: 1,183
Default Network query ... again



Ok, I have a home network consisting of in total 9 pcs and a few xboxs
and playstation plus an ip camera of which only some of them are always
turned on ... All connected via a router and switches.

The always on PCs are two Win 7 pcs almost identical (same Dell model
slightly different cpu, 2.8Gb & 3.0Gb and vid card, nVidia versus ATI)
and the third is an old pc running XP with nothing special in it. The
other pcs, xboxs, ps's and ip camera don't seem relevent to problem.

The problem is that one of the Win7 pcs seems to always have some
problem with the network. Speficially it stops allowing the XP pc to
connect to it. It does not seem to matter what pc is the master browser
although if it is the XP pc the stoppage seems to take longer to
develope. The XP pc can always see the "good" Win7 pc and for that
matter any and all other devices if they're turned on also. Incidently
the IP camera is on the same switch and is always visible to all the
pcs. AND from the problem Win7 pc there never apopears to be a problem
and all devices are seen properly.

If I boot the XP pc nothing is changed. If I boot the Win7 pc all's well
for a period of time before the XP pc can't connect to the Win7 pc again
.... all of a sudden and for no apparent reason yet all other pcs remain
unaffected by "whatever" including other XP pcs if turned on.

It's just the one Win7 pc has the problemn and I'm at a loss to figure
out what's causing it. The troublesome pc has basically no software
installed on it as it used almost solely for connection to stereo and tv
as a multi-media player, gets updates as they come etc. etc. Doesn't
appear to be anything "rouge" on it etc.

I'm thinking of killing the onboard network card and installing a stand
alone card to see if that fixes the issue but other ideas more than
welcome at this point.
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  #2  
Old December 12th 17, 11:08 PM posted to alt.windows7.general
Char Jackson
external usenet poster
 
Posts: 10,449
Default Network query ... again

On Tue, 12 Dec 2017 16:34:43 -0400, pjp
wrote:



Ok, I have a home network consisting of in total 9 pcs and a few xboxs
and playstation plus an ip camera of which only some of them are always
turned on ... All connected via a router and switches.


I'm guessing you meant to say all connected via switches. If the only
router in the mix is a gateway, (aka NAT), router, then it's not
relevant to the discussion, but if you actually have a router segmenting
your LAN, that leads to a whole new set of questions and considerations.

The problem is that one of the Win7 pcs seems to always have some
problem with the network. Speficially it stops allowing the XP pc to
connect to it.


During these periods, do you still have basic connectivity, for example
via ICMP ping? Are all devices on the LAN configured to use DHCP, or are
you configuring static networking info?

It does not seem to matter what pc is the master browser
although if it is the XP pc the stoppage seems to take longer to
develope. The XP pc can always see the "good" Win7 pc and for that
matter any and all other devices if they're turned on also. Incidently
the IP camera is on the same switch and is always visible to all the
pcs. AND from the problem Win7 pc there never apopears to be a problem
and all devices are seen properly.


So far, it sounds like the firewall on the problematic PC, but wild
guesses can be a time suck. Still, you might temporarily disable it. Do
you have any other anti-malware programs installed? Some of them are
known to see a set of circumstances and react by shutting down network
access.

I'm thinking of killing the onboard network card and installing a stand
alone card to see if that fixes the issue but other ideas more than
welcome at this point.


Run a continuous ping (ping -t 1.2.3.4) where 1.2.3.4 means the address
of a remote host. Ping in both directions, both to and from the
problematic PC.

Try to determine if this is a network connectivity issue, a network
discovery issue, or a firewall issue. Regarding the NIC, if it works for
your continuous ping in both directions, then it's probably fine.

--

Char Jackson
  #3  
Old December 13th 17, 03:50 AM posted to alt.windows7.general
pjp[_10_]
external usenet poster
 
Posts: 1,183
Default Network query ... again

In article ,
lid says...

On Tue, 12 Dec 2017 16:34:43 -0400, pjp
wrote:



Ok, I have a home network consisting of in total 9 pcs and a few xboxs
and playstation plus an ip camera of which only some of them are always
turned on ... All connected via a router and switches.


I'm guessing you meant to say all connected via switches. If the only
router in the mix is a gateway, (aka NAT), router, then it's not
relevant to the discussion, but if you actually have a router segmenting
your LAN, that leads to a whole new set of questions and considerations.

The problem is that one of the Win7 pcs seems to always have some
problem with the network. Speficially it stops allowing the XP pc to
connect to it.


During these periods, do you still have basic connectivity, for example
via ICMP ping? Are all devices on the LAN configured to use DHCP, or are
you configuring static networking info?

It does not seem to matter what pc is the master browser
although if it is the XP pc the stoppage seems to take longer to
develope. The XP pc can always see the "good" Win7 pc and for that
matter any and all other devices if they're turned on also. Incidently
the IP camera is on the same switch and is always visible to all the
pcs. AND from the problem Win7 pc there never apopears to be a problem
and all devices are seen properly.


So far, it sounds like the firewall on the problematic PC, but wild
guesses can be a time suck. Still, you might temporarily disable it. Do
you have any other anti-malware programs installed? Some of them are
known to see a set of circumstances and react by shutting down network
access.


I'm unsure if XP is even running any kind of Firewall but I'll check the
Win7 pc's. I don't really care if XP gets hacked as it'll have to be
thru another pc on network given it's never used except as a media
player. For that metter same with the Win7 pc in question.

I'm thinking of killing the onboard network card and installing a stand
alone card to see if that fixes the issue but other ideas more than
welcome at this point.


Run a continuous ping (ping -t 1.2.3.4) where 1.2.3.4 means the address
of a remote host. Ping in both directions, both to and from the
problematic PC.

Try to determine if this is a network connectivity issue, a network
discovery issue, or a firewall issue. Regarding the NIC, if it works for
your continuous ping in both directions, then it's probably fine.


Yea, that's easy enoguh to try for 1/2 hr or so see what happens.

To be more specific.

Router is connected to a wireless attenna for my ISP. I'm rural area,
it's that or dialup.

4 connections go off the router.

3 of those connections have a switch at their end as they terminate in
other parts of the house to allow multipule devices to connect.

On one of those switches is a second router that's been dummied down to
be nothing more than a switch but wireless left active. That's to extend
wireless to entire house giving good reception. Each wireless has it's
own SID so you know which one you are connected to.

It all works exactly as one expects when everything is first turned on.
Only the one connection between the Win7 pc and the XP pc ever screws
up. Even shared printers and a shared scanner all work all the time. And
a second laptop XP pc also connects all the time without issue.

Network map is not always accurate and seems to depend on pc being used
to display it!!!
  #4  
Old December 13th 17, 05:03 AM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default Network query ... again

pjp wrote:

I'm unsure if XP is even running any kind of Firewall but I'll check the
I don't really care if XP gets hacked as it'll have to be
thru another pc on network given it's never used except as a media
player.


I wouldn't say that too loudly. There is an SMB1 exploit that
works against WinXP, allowing something to spread in your
computer room. As well as Ransomware mounting any file shares
it finds in one of your other PCs, to attack the WinXp machine.

The only way a machine is "safe", is if it's physically isolated
(no cable to other machines, no Wifi etc). As long as it's sitting
on a network, "stuff can climb in through the snout" :-)

There is a whole set of patches for WinXP. There are two problems.
They don't come in, if you fire up Windows Update. The patches
were not put in Windows Update. And in some cases, one of the
patches has a side effect, so it's not necessarily a perfect
patch either. I had to remove the patch I installed,
for that reason.

If you're going to run the WinXP machine as a player, just make
a backup and store the backup in an isolated place. If the WinXP
machine gets tipped over, a restore will fix it up.

*******

I haven't been keeping any records from around this
time. So this is just a teaser. It's possible the exploits
from around this time, were related to some "lost" NSA materials.

https://www.ghacks.net/2017/05/13/mi...crypt-attacks/

https://en.wikipedia.org/wiki/EternalBlue

"It uses seven exploits developed by the NSA"

"EternalBlue was among the several exploits used,
in conjunction with the DoublePulsar backdoor implant tool."

I used to think this sort of monkey business only happened
to "other people", but a guy in one of my other groups,
got tipped over by ransomware, and because he didn't
have comprehensive backups, it took *months* to reinstall
everything. And it's the typical delivery method,
an email claiming money is owed, with an invoice as
an attachment. He double-clicked the attachment...

Paul
  #5  
Old December 13th 17, 06:42 AM posted to alt.windows7.general
Char Jackson
external usenet poster
 
Posts: 10,449
Default Network query ... again

On Tue, 12 Dec 2017 22:50:17 -0400, pjp
wrote:

In article ,
says...

On Tue, 12 Dec 2017 16:34:43 -0400, pjp
wrote:



Ok, I have a home network consisting of in total 9 pcs and a few xboxs
and playstation plus an ip camera of which only some of them are always
turned on ... All connected via a router and switches.


I'm guessing you meant to say all connected via switches. If the only
router in the mix is a gateway, (aka NAT), router, then it's not
relevant to the discussion, but if you actually have a router segmenting
your LAN, that leads to a whole new set of questions and considerations.

The problem is that one of the Win7 pcs seems to always have some
problem with the network. Speficially it stops allowing the XP pc to
connect to it.


During these periods, do you still have basic connectivity, for example
via ICMP ping? Are all devices on the LAN configured to use DHCP, or are
you configuring static networking info?

It does not seem to matter what pc is the master browser
although if it is the XP pc the stoppage seems to take longer to
develope. The XP pc can always see the "good" Win7 pc and for that
matter any and all other devices if they're turned on also. Incidently
the IP camera is on the same switch and is always visible to all the
pcs. AND from the problem Win7 pc there never apopears to be a problem
and all devices are seen properly.


So far, it sounds like the firewall on the problematic PC, but wild
guesses can be a time suck. Still, you might temporarily disable it. Do
you have any other anti-malware programs installed? Some of them are
known to see a set of circumstances and react by shutting down network
access.


I'm unsure if XP is even running any kind of Firewall but I'll check the
Win7 pc's. I don't really care if XP gets hacked as it'll have to be
thru another pc on network given it's never used except as a media
player. For that metter same with the Win7 pc in question.

I'm thinking of killing the onboard network card and installing a stand
alone card to see if that fixes the issue but other ideas more than
welcome at this point.


Run a continuous ping (ping -t 1.2.3.4) where 1.2.3.4 means the address
of a remote host. Ping in both directions, both to and from the
problematic PC.

Try to determine if this is a network connectivity issue, a network
discovery issue, or a firewall issue. Regarding the NIC, if it works for
your continuous ping in both directions, then it's probably fine.


Yea, that's easy enoguh to try for 1/2 hr or so see what happens.

To be more specific.

Router is connected to a wireless attenna for my ISP. I'm rural area,
it's that or dialup.

4 connections go off the router.

3 of those connections have a switch at their end as they terminate in
other parts of the house to allow multipule devices to connect.

On one of those switches is a second router that's been dummied down to
be nothing more than a switch but wireless left active. That's to extend
wireless to entire house giving good reception. Each wireless has it's
own SID so you know which one you are connected to.

It all works exactly as one expects when everything is first turned on.
Only the one connection between the Win7 pc and the XP pc ever screws
up. Even shared printers and a shared scanner all work all the time. And
a second laptop XP pc also connects all the time without issue.

Network map is not always accurate and seems to depend on pc being used
to display it!!!


I'm with you right up to the end, where you mention Network Map. As you
may know, Network Map has exactly nothing whatsoever to do with actual
networking.

--

Char Jackson
  #6  
Old December 13th 17, 08:20 AM posted to alt.windows7.general
pjp[_10_]
external usenet poster
 
Posts: 1,183
Default Network query ... again

In article ,
lid says...

On Tue, 12 Dec 2017 22:50:17 -0400, pjp
wrote:

In article ,
says...

On Tue, 12 Dec 2017 16:34:43 -0400, pjp
wrote:



Ok, I have a home network consisting of in total 9 pcs and a few xboxs
and playstation plus an ip camera of which only some of them are always
turned on ... All connected via a router and switches.

I'm guessing you meant to say all connected via switches. If the only
router in the mix is a gateway, (aka NAT), router, then it's not
relevant to the discussion, but if you actually have a router segmenting
your LAN, that leads to a whole new set of questions and considerations.

The problem is that one of the Win7 pcs seems to always have some
problem with the network. Speficially it stops allowing the XP pc to
connect to it.

During these periods, do you still have basic connectivity, for example
via ICMP ping? Are all devices on the LAN configured to use DHCP, or are
you configuring static networking info?

It does not seem to matter what pc is the master browser
although if it is the XP pc the stoppage seems to take longer to
develope. The XP pc can always see the "good" Win7 pc and for that
matter any and all other devices if they're turned on also. Incidently
the IP camera is on the same switch and is always visible to all the
pcs. AND from the problem Win7 pc there never apopears to be a problem
and all devices are seen properly.

So far, it sounds like the firewall on the problematic PC, but wild
guesses can be a time suck. Still, you might temporarily disable it. Do
you have any other anti-malware programs installed? Some of them are
known to see a set of circumstances and react by shutting down network
access.


I'm unsure if XP is even running any kind of Firewall but I'll check the
Win7 pc's. I don't really care if XP gets hacked as it'll have to be
thru another pc on network given it's never used except as a media
player. For that metter same with the Win7 pc in question.

I'm thinking of killing the onboard network card and installing a stand


Yea, network map was just a little curtiosity I added. You'd thimk every
pc on network would show same map but it doesn't?
 




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